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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b43c6f82c25b0e3a6f098e6eaad9b31b3657dcb3ea2206a77909fb58fac00b22' 
  AND token = '3OfxaKqyRvrTCKIAq5Fvfi2+WH1dcpX7zlpBoILVwq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}